温度及冻融循环对滨海盐渍土土—水特征曲线的影响研究
Effect of Temperature and Freeze-thaw Cycles on Soil-water Characteristics Curve of Coastal Saline Soil
耿天娇 1丁子凯2
作者信息
- 1. 郑州财经学院,河南 郑州 450000
- 2. 中国电子工程设计院股份有限公司河南分公司,河南 郑州 450000
- 折叠
摘要
为探讨环境温度、冻融循环次数对滨海盐渍土持水特性的影响,以黄骅地区滨海盐渍土作为研究对象,通过滤纸法测得不同环境温度及冻融循环次数下各试样的基质吸力、渗透吸力、总吸力土—水特征曲线,分析不同因素下盐渍土土—水特征曲线及持水特性的变化规律;通过Van Genuchten(VG)模型对试验结果进行拟合分析.结果表明:随着环境温度和冻融循环次数增加,盐渍土持水性能降低,其中冻融循环对持水特性的影响随着次数的增加而逐渐减小.VG模型对滨海盐渍土土—水特征曲线的拟合优度较高;根据试验结果及拟合结果,分别建立了考虑环境温度、冻融循环次数的土—水特征曲线模型,可为滨海盐渍土区域的工程建设提供参考.
Abstract
In order to explore the effects of environmental temperature and freeze-thaw cycles on the water retention characteristics of coastal saline soil,taking coastal saline soil in Huanghua area as the research object,the matric suction,osmotic suction and total suction soil-water characteristic curves of each sample under differ-ent environmental temperature and freeze-thaw cycles were measured by filter paper method,and the change laws of soil-water characteristic curves and water retention characteristics of saline soil under different factors were an-alyzed.The experimental results were fitted and analyzed by Van Genuchten(VG)model.The results show that with the increase of environmental temperature and the number of freeze-thaw cycles,the water retention perform-ance of the saline soil decreases.The influence of freeze-thaw cycles on the water retention characteristics de-creases with the increase of the number of freeze-thaw cycles.The VG model has a good fit for soil-water charac-teristic curve of coastal saline soil.According to the experimental results and fitting results,soil-water character-istic curve models were established respectively considering the environmental temperature and the number of freeze-thaw cycles,which can provide reference for engineering construction in coastal saline soil area.
关键词
滨海盐渍土/环境温度/冻融循环/土—水特征曲线/Van/Genuchten模型Key words
coastal saline soil/ambient temperature/freeze-thaw cycle/soil-water characteristic curve/Van Genuchten model引用本文复制引用
基金项目
河北省自然科学基金(E2019201422)
出版年
2024
NETL
NSTL
万方数据